78253980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{619}}^1$

素因数の和:688

約数の個数: 144

約数和(自身を含む): 261233280

約数和(自身を除く): 182979300

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 43, 49, 60, 70, 84, 86, 98, 105, 129, 140, 147, 172, 196, 210, 215, 245, 258, 294, 301, 420, 430, 490, 516, 588, 602, 619, 645, 735, 860, 903, 980, 1204, 1238, 1290, 1470, 1505, 1806, 1857, 2107, 2476, 2580, 2940, 3010, 3095, 3612, 3714, 4214, 4333, 4515, 6020, 6190, 6321, 7428, 8428, 8666, 9030, 9285, 10535, 12380, 12642, 12999, 17332, 18060, 18570, 21070, 21665, 25284, 25998, 26617, 30331, 31605, 37140, 42140, 43330, 51996, 53234, 60662, 63210, 64995, 79851, 86660, 90993, 106468, 121324, 126420, 129990, 133085, 151655, 159702, 181986, 186319, 259980, 266170, 303310, 319404, 363972, 372638, 399255, 454965, 532340, 558957, 606620, 745276, 798510, 909930, 931595, 1117914, 1304233, 1597020, 1819860, 1863190, 2235828, 2608466, 2794785, 3726380, 3912699, 5216932, 5589570, 6521165, 7825398, 11179140, 13042330, 15650796, 19563495, 26084660, 39126990, 78253980]

約数ペア:

[(1, 78253980), (2, 39126990), (3, 26084660), (4, 19563495), (5, 15650796), (6, 13042330), (7, 11179140), (10, 7825398), (12, 6521165), (14, 5589570), (15, 5216932), (20, 3912699), (21, 3726380), (28, 2794785), (30, 2608466), (35, 2235828), (42, 1863190), (43, 1819860), (49, 1597020), (60, 1304233), (70, 1117914), (84, 931595), (86, 909930), (98, 798510), (105, 745276), (129, 606620), (140, 558957), (147, 532340), (172, 454965), (196, 399255), (210, 372638), (215, 363972), (245, 319404), (258, 303310), (294, 266170), (301, 259980), (420, 186319), (430, 181986), (490, 159702), (516, 151655), (588, 133085), (602, 129990), (619, 126420), (645, 121324), (735, 106468), (860, 90993), (903, 86660), (980, 79851), (1204, 64995), (1238, 63210), (1290, 60662), (1470, 53234), (1505, 51996), (1806, 43330), (1857, 42140), (2107, 37140), (2476, 31605), (2580, 30331), (2940, 26617), (3010, 25998), (3095, 25284), (3612, 21665), (3714, 21070), (4214, 18570), (4333, 18060), (4515, 17332), (6020, 12999), (6190, 12642), (6321, 12380), (7428, 10535), (8428, 9285), (8666, 9030)]