19878440

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:123

約数の個数: 128

約数和(自身を含む): 52254720

約数和(自身を除く): 32376280

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 23, 31, 34, 40, 41, 46, 62, 68, 82, 85, 92, 115, 124, 136, 155, 164, 170, 184, 205, 230, 248, 310, 328, 340, 391, 410, 460, 527, 620, 680, 697, 713, 782, 820, 920, 943, 1054, 1240, 1271, 1394, 1426, 1564, 1640, 1886, 1955, 2108, 2542, 2635, 2788, 2852, 3128, 3485, 3565, 3772, 3910, 4216, 4715, 5084, 5270, 5576, 5704, 6355, 6970, 7130, 7544, 7820, 9430, 10168, 10540, 12121, 12710, 13940, 14260, 15640, 16031, 18860, 21080, 21607, 24242, 25420, 27880, 28520, 29233, 32062, 37720, 43214, 48484, 50840, 58466, 60605, 64124, 80155, 86428, 96968, 108035, 116932, 121210, 128248, 146165, 160310, 172856, 216070, 233864, 242420, 292330, 320620, 432140, 484840, 496961, 584660, 641240, 864280, 993922, 1169320, 1987844, 2484805, 3975688, 4969610, 9939220, 19878440]

約数ペア:

[(1, 19878440), (2, 9939220), (4, 4969610), (5, 3975688), (8, 2484805), (10, 1987844), (17, 1169320), (20, 993922), (23, 864280), (31, 641240), (34, 584660), (40, 496961), (41, 484840), (46, 432140), (62, 320620), (68, 292330), (82, 242420), (85, 233864), (92, 216070), (115, 172856), (124, 160310), (136, 146165), (155, 128248), (164, 121210), (170, 116932), (184, 108035), (205, 96968), (230, 86428), (248, 80155), (310, 64124), (328, 60605), (340, 58466), (391, 50840), (410, 48484), (460, 43214), (527, 37720), (620, 32062), (680, 29233), (697, 28520), (713, 27880), (782, 25420), (820, 24242), (920, 21607), (943, 21080), (1054, 18860), (1240, 16031), (1271, 15640), (1394, 14260), (1426, 13940), (1564, 12710), (1640, 12121), (1886, 10540), (1955, 10168), (2108, 9430), (2542, 7820), (2635, 7544), (2788, 7130), (2852, 6970), (3128, 6355), (3485, 5704), (3565, 5576), (3772, 5270), (3910, 5084), (4216, 4715)]