20898100

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{647}}^1$

素因数の和:697

約数の個数: 72

約数和(自身を含む): 50621760

約数和(自身を除く): 29723660

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 25, 34, 38, 50, 68, 76, 85, 95, 100, 170, 190, 323, 340, 380, 425, 475, 646, 647, 850, 950, 1292, 1294, 1615, 1700, 1900, 2588, 3230, 3235, 6460, 6470, 8075, 10999, 12293, 12940, 16150, 16175, 21998, 24586, 32300, 32350, 43996, 49172, 54995, 61465, 64700, 109990, 122930, 208981, 219980, 245860, 274975, 307325, 417962, 549950, 614650, 835924, 1044905, 1099900, 1229300, 2089810, 4179620, 5224525, 10449050, 20898100]

約数ペア:

[(1, 20898100), (2, 10449050), (4, 5224525), (5, 4179620), (10, 2089810), (17, 1229300), (19, 1099900), (20, 1044905), (25, 835924), (34, 614650), (38, 549950), (50, 417962), (68, 307325), (76, 274975), (85, 245860), (95, 219980), (100, 208981), (170, 122930), (190, 109990), (323, 64700), (340, 61465), (380, 54995), (425, 49172), (475, 43996), (646, 32350), (647, 32300), (850, 24586), (950, 21998), (1292, 16175), (1294, 16150), (1615, 12940), (1700, 12293), (1900, 10999), (2588, 8075), (3230, 6470), (3235, 6460)]