388991720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{409}}^1$

素因数の和:523

約数の個数: 128

約数和(自身を含む): 991872000

約数和(自身を除く): 602880280

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 59, 62, 65, 104, 118, 124, 130, 155, 236, 248, 260, 295, 310, 403, 409, 472, 520, 590, 620, 767, 806, 818, 1180, 1240, 1534, 1612, 1636, 1829, 2015, 2045, 2360, 3068, 3224, 3272, 3658, 3835, 4030, 4090, 5317, 6136, 7316, 7670, 8060, 8180, 9145, 10634, 12679, 14632, 15340, 16120, 16360, 18290, 21268, 23777, 24131, 25358, 26585, 30680, 36580, 42536, 47554, 48262, 50716, 53170, 63395, 73160, 95108, 96524, 101432, 106340, 118885, 120655, 126790, 164827, 190216, 193048, 212680, 237770, 241310, 253580, 313703, 329654, 475540, 482620, 507160, 627406, 659308, 748061, 824135, 951080, 965240, 1254812, 1318616, 1496122, 1568515, 1648270, 2509624, 2992244, 3137030, 3296540, 3740305, 5984488, 6274060, 6593080, 7480610, 9724793, 12548120, 14961220, 19449586, 29922440, 38899172, 48623965, 77798344, 97247930, 194495860, 388991720]

約数ペア:

[(1, 388991720), (2, 194495860), (4, 97247930), (5, 77798344), (8, 48623965), (10, 38899172), (13, 29922440), (20, 19449586), (26, 14961220), (31, 12548120), (40, 9724793), (52, 7480610), (59, 6593080), (62, 6274060), (65, 5984488), (104, 3740305), (118, 3296540), (124, 3137030), (130, 2992244), (155, 2509624), (236, 1648270), (248, 1568515), (260, 1496122), (295, 1318616), (310, 1254812), (403, 965240), (409, 951080), (472, 824135), (520, 748061), (590, 659308), (620, 627406), (767, 507160), (806, 482620), (818, 475540), (1180, 329654), (1240, 313703), (1534, 253580), (1612, 241310), (1636, 237770), (1829, 212680), (2015, 193048), (2045, 190216), (2360, 164827), (3068, 126790), (3224, 120655), (3272, 118885), (3658, 106340), (3835, 101432), (4030, 96524), (4090, 95108), (5317, 73160), (6136, 63395), (7316, 53170), (7670, 50716), (8060, 48262), (8180, 47554), (9145, 42536), (10634, 36580), (12679, 30680), (14632, 26585), (15340, 25358), (16120, 24131), (16360, 23777), (18290, 21268)]