21228320

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6983}}^1$

素因数の和:7017

約数の個数: 48

約数和(自身を含む): 52799040

約数和(自身を除く): 31570720

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 6983, 13966, 27932, 34915, 55864, 69830, 111728, 132677, 139660, 223456, 265354, 279320, 530708, 558640, 663385, 1061416, 1117280, 1326770, 2122832, 2653540, 4245664, 5307080, 10614160, 21228320]

約数ペア:

[(1, 21228320), (2, 10614160), (4, 5307080), (5, 4245664), (8, 2653540), (10, 2122832), (16, 1326770), (19, 1117280), (20, 1061416), (32, 663385), (38, 558640), (40, 530708), (76, 279320), (80, 265354), (95, 223456), (152, 139660), (160, 132677), (190, 111728), (304, 69830), (380, 55864), (608, 34915), (760, 27932), (1520, 13966), (3040, 6983)]