21419900

素因数分解:

$2^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1$

素因数の和:243

約数の個数: 72

約数和(自身を含む): 49580160

約数和(自身を除く): 28160260

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 46, 50, 67, 92, 100, 115, 134, 139, 230, 268, 278, 335, 460, 556, 575, 670, 695, 1150, 1340, 1390, 1541, 1675, 2300, 2780, 3082, 3197, 3350, 3475, 6164, 6394, 6700, 6950, 7705, 9313, 12788, 13900, 15410, 15985, 18626, 30820, 31970, 37252, 38525, 46565, 63940, 77050, 79925, 93130, 154100, 159850, 186260, 214199, 232825, 319700, 428398, 465650, 856796, 931300, 1070995, 2141990, 4283980, 5354975, 10709950, 21419900]

約数ペア:

[(1, 21419900), (2, 10709950), (4, 5354975), (5, 4283980), (10, 2141990), (20, 1070995), (23, 931300), (25, 856796), (46, 465650), (50, 428398), (67, 319700), (92, 232825), (100, 214199), (115, 186260), (134, 159850), (139, 154100), (230, 93130), (268, 79925), (278, 77050), (335, 63940), (460, 46565), (556, 38525), (575, 37252), (670, 31970), (695, 30820), (1150, 18626), (1340, 15985), (1390, 15410), (1541, 13900), (1675, 12788), (2300, 9313), (2780, 7705), (3082, 6950), (3197, 6700), (3350, 6394), (3475, 6164)]